diff options
Diffstat (limited to 'ndp.c')
| -rw-r--r-- | ndp.c | 32 |
1 files changed, 18 insertions, 14 deletions
@@ -171,6 +171,21 @@ struct ndp_ns { } __attribute__((packed)); /** + * ndp_send() - Send an NDP message + * @c: Execution context + * @dst: IPv6 address to send the message to + * @buf: ICMPv6 header + message payload + * @l4len: Length of message, including ICMPv6 header + */ +static void ndp_send(const struct ctx *c, const struct in6_addr *dst, + const void *buf, size_t l4len) +{ + const struct in6_addr *src = &c->ip6.our_tap_ll; + + tap_icmp6_send(c, src, dst, buf, l4len); +} + +/** * ndp() - Check for NDP solicitations, reply as needed * @c: Execution context * @ih: ICMPv6 header @@ -223,9 +238,6 @@ int ndp(const struct ctx *c, const struct icmp6hdr *ih, }, }, }; - const struct in6_addr *rsaddr; /* src addr for reply */ - unsigned char *ptr = NULL; - size_t dlen; if (ih->icmp6_type < RS || ih->icmp6_type > NA) return 0; @@ -249,7 +261,9 @@ int ndp(const struct ctx *c, const struct icmp6hdr *ih, sizeof(na.target_addr)); memcpy(na.target_l2_addr.mac, c->our_tap_mac, ETH_ALEN); + ndp_send(c, saddr, &na, sizeof(struct ndp_na)); } else if (ih->icmp6_type == RS) { + unsigned char *ptr = NULL; size_t dns_s_len = 0; int i, n; @@ -332,18 +346,8 @@ int ndp(const struct ctx *c, const struct icmp6hdr *ih, dns_done: memcpy(&ra.source_ll.mac, c->our_tap_mac, ETH_ALEN); - } else { - return 1; - } - rsaddr = &c->ip6.our_tap_ll; - - if (ih->icmp6_type == NS) { - dlen = sizeof(struct ndp_na); - tap_icmp6_send(c, rsaddr, saddr, &na, dlen); - } else if (ih->icmp6_type == RS) { - dlen = ptr - (unsigned char *)&ra; - tap_icmp6_send(c, rsaddr, saddr, &ra, dlen); + ndp_send(c, saddr, &ra, ptr - (unsigned char *)&ra); } return 1; |